Device and method for suppressing vortex-induced vibration of submarine pipeline

Abstract

The invention discloses a device and method for suppressing vortex-induced vibration of a submarine pipeline, which comprises two support plates, a drive cavity is opened inside the two support plates, and the opposite cavity walls of the two drive cavities pass through The bearings are rotatably connected with two screw rods, and the threads on the walls of the two screw rods in each of the drive chambers are symmetrically arranged, and one end of the four screw rods extends through the two drive chambers respectively. Inside, the beneficial effects achieved by the present invention are: a device for suppressing vortex-induced vibration of a submarine pipeline in the present invention, when in use, can place the pipeline between two support plates, and then drive the clamping block and the clamping The groove clamps pipes of different sizes, and then can support the pipes to avoid random shaking of the pipes when they are used on the seabed. At the same time, a protective mechanism is installed on the outside to protect them and prevent the pipes from being damaged by vibrations caused by random seabed eddy currents.

Description

technical field [0001] The invention relates to a device and method for suppressing vortex-induced vibration, in particular to a device and method for suppressing vortex-induced vibration of a submarine pipeline, belonging to the technical field of vortex-induced vibration suppression. Background technique [0002] When the fluid bypasses the blunt body structure, due to physical reasons such as fluid viscosity, alternate shedding vortices appear at the rear of the structure; this vortex motion causes the structure to be subject to alternating pulsating lateral forces (called lift), and the fluid to the structure The applied force in the flow direction means that the structure is resisted; the structure will be displaced along the flow direction after being resisted, which will cause the end buildings linked to the column structure, such as platforms, to drift within a certain range; Lift force will cause structural vibration (vortex induced vibration) due to the alternating...

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Problems solved by technology

[0002] When the fluid bypasses the blunt body structure, due to physical reasons such as fluid viscosity, alternate shedding vortices appear at the rear of the structure; this vortex motion causes the structure to be subject to alternating pulsating lateral forces (called lift), and the fluid to the structure The applied force in the flow direction means that the structure is resisted; the structure will be displaced along the flow direction after being resisted, which will cause the end buildings linked to the column structure, such as platforms, to drift within a certain range; Lift force will cause structural vibration (vortex induced vibration) due to the alternating change of its direction. In special cases, it is mainly when the frequency of vortex shedding formed after the incoming flow bypasses the cylinder is close to the natural frequency of the structure, that is, resonance. The amplitude of the oscillation increases sharply, which may even lead to structural fatigue damage, resulting in structural damage such as cracking or fracture, which will affect the corresponding production activities or even stop production

[0003] However, when the existing vortex-induced vibration suppression equipment is in use, it is simply provided with diamond-shaped protective equipment on the outside, which can only have a certain shunt effect on the torrent of the seabed, and it will still be lost during long-term use. It only has a certain vortex-induced vibration suppression effect, so it is necessary to propose a device and method for suppressing vortex-induced vibration of submarine pipelines.

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